Machine for hot-lacquering metal tubes.



R. L. HORRELL. MACHINE FOR HOT LAGQUBRING METAL TUBES.

APPLICATION rum) JAN. 6, 1913. 1,070,035, Patented Aug. 12, 1913.

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R. L. HORRELL.

MACHINE FOR HOT LAOQUERING METAL TUBES.

APPLICATION FILED JAN. 6, 1913.

LOYQ035, Patented Aug. 12, 1913.

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Witnesses. Inventor.

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MACHINE FOR HOT-LACQUERING METAL TUBES.

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Specification of Letters Patent.

Patented Aug. 12. 1913.

Application filed January 6, 1813. Serial No. 7%,543.

To all whom it may concern: e Be it known that 1, ROBERT LEONARDHOB-BELL, a subject of the King of Great Britain, residing at LaGarenne-Colombe, inthe Republic of France, have invented certain new anduseful Improvements in Machines for Hot Lacq uering Metal Tubes, ofwhich the following is a specification.

This invention relates to a machine for lacquering metal tubes andsimilar objects which have to be heated before the coating of lacquer isapplied. At present the lacqueringof such objects is effected by hand,by means of a brush; this manipulation is difficultto execute as itrequires skilled labor and is a slow process One of the dithcultiesconnected with this kind of work results from the necessity to heat theobjects before they are lacquered and further from the fact that saidobjects, after the lacquer has been applied, must not be touched untilthe coating of lacquer is cold.

According to this invention the application of the lacquer is efiectedmechanically and all expert labor suppressed. The tube in beingcontinuously rotated, is heated by means of a Bunsen burner which movesparallel with the axis of the tube, said tube being coated with lacquerby means of a spraying apparatus which also moves parallel with thetubetogether with said burner. The manipulation of the tube is facilitatedby aspecial. handlewhich enables the tube being picked up, inserted inthe machine and instantaneously rotated, and removed from the machinewhen lacquered, without being otherwise handled. c

The invention is shown by way of example in the, accompanying drawings.

Figure 1 is a parallel front elevation of themachineTf Fig. 2 shows on alarger scale and in se ction the handle for manipulating the tube." Fig;3 represents in elevation the spindle whichis designed to carry one endof the tube; Figs. 4 and 5 show the sliding puppet on a larger scale, inhorizontal and 1 vertical section respectively.

' The machine essentially consists of a lathe a comprising" the drivingmechansm b for the movable "slide, a fixed puppet c, a slid- I ingpuppet cl a screw 6 and a carriage f.

The-fixed puppet c has a center 9 with a cylindrical part of smalldiameter adapted to engage mto the tube to be lacquered. The

sliding puppet d is designed to receive the conical rear part of theback-center h. Theback-center h which carries a handleis shown in Fig. 2in section and in natural size. The back-center h fixed upon the handlek has a horizontal sleeve 6 designed to receive a spindle m which isinserted into one end of the tube to be lacquered. I,

the point of a set screw p screwed into the sleeve 2'. The pointed endof saidspindle m' bears against a steel disk 9 located in said sleeve 71so that the spindle can freely revolve in said sleeve.

The carriage f is adapted to slide in either direction along two rods 9"parallel with the axis of the lathe, it'is connected in any convenientmanner with a nut s adapted to move along the screw 6 when said screw isin rotation. The motion of the screw 6 is controlled by a reversibleclutch. Upon the carriage there are fixed in any convenient manner aspraying apparatus t containing the lacquer, burner 14 which isconnectedby means of a tube 2; with a gas main.

In the sliding puppet d a rod w is located which has a holloww at oneend designed to'receive the end of the back-center h. The

other end of said rod 11: is hinged to the middle of a lever y. Thislever 31 can pivot around a pin z fixed upon one end of a link 2 theother end of which-is hinged upon the sliding puppet d. The lever y isconnected with said rod 'w through the intermediary of a sleeve 3' andof a spiral spring 4 surrounding the rear end of said rod. Upon theslidand a Bunsen in puppet d a segment 11 having a series I 0 holes 5 isfixed, said holes serving to re ceive a catch pin 6 fixed at the end ofa small lever 7 pivotally mounted upon the handle of the lever y andhavin its end 8 situated directly over said hand e 901 the lever 11 Aspring 10 isarranged between said handle 9-and the end 8 of the lever 7.for continuously maintaining the catch pin 6 in engagement with one ofthe holes 5.

The machine operates in the following manner :The' spindle m is insertedinto one end of the tube 12 to be lacquered, this tube can then befreely manipulated by holds ing the handle 70. The other end of tube 12is then pushed over the center 9 of the fixed puppet, the rod w beingpulled back by means of the lever y .so that the hollow m 'of said rodcan engage with the back-center 12. By operating the lever 1 the spring4 presses the movable rod w against the end of the back-center h wherebythe tube 12 is securely fixed in its position. The pressure exerted bythe rod 10 upon the backcenter 72 is regulated by varying the posi tionof the lever 3/ by means of the catchpin 6. When the lathe is operatedthe tube 12 rotates continuously. The burner 'u is then set in motionalong the tube 12 so as to heat the same from one end'to the other. Whenthe carriage or slide has arrived at the end of the tube the sprayingapparatus 2- is operated and the motion of the slide is reversed and thelatter brought back to its initial position; the burner continuing tooperate all the time. The tube 12 is thus completely coated withlacquer. By pushing against the handle 9 of the lever y the back-centeris released and the hot and lacquired tube can be removed from themachine by means of the handle is. All the manipulations are executedwithout touching the tube 12 with the hands.

Having thus described my invention what I claim is C 1. Machine forlacquering metal tubes comprising in combination with a lathe, a fixedpuppet serving as abutinent for one end of the tube to be'lacquered, asliding carriage, a Bunsen burner and a spraying apparatus containinglacquer mounted upon said sliding carriage, a sliding puppet, aback-center in said shding puppet carrying the other end of the tube tobe lacquered, a handle of said back center, and means for fixing saidback-center-. in position, substantiallyas described andshown and forthe purpose set forth.

2. Machine for lacquering metal tubes comprising in combination with alathe, a fixed pu pet, serving as abutment for one end of ta tube to belacquered, a sliding carriage, a Bunsen burner and a spraying apparatuswntaining lacquer mounted upon said carriage, a. sliding puppet, :1

back-center for carrying the other end of said tube, a handle of saidback-center, a

horizontal sleeve projecting from said backcenter, a spindle in saidsleeve having a circular groove, a screw screwed in said sleeve andprojecting into said groove of the spindle, an annular flange of saidspindle hearing against the end of the tube to be lacquered, a point atthe rear end of Said spindle, a steel disk in said sleeve against whichbears the point of said spindle, substantially as described and shownand for the purpose set forth.

3. Machine for lacquering metal tubes comprising in combination with alathe, a fixed puppet serving as abutment for one end of the tube to belacquered,'a sliding carriage, a Bunsen burner and a spraying apparatuscontaining lacquer mounted upon said sliding carriage, a sliding puppet,a back-center in said sliding puppet, carrying the other end of the tubeto be lacquered, a handle of said back-center, a rod movably mounted insaid sliding support and having a hollow at'the front end for thereception of said back-center, a short sleeve upon the rear end of saidrod, a spiral spring surrounding the rear part of said rod and bearingagainst a shoulder of the rod and against said sleeve, a lever fixedupon said sleeve, a link hingedly mounted with one end upon said slidingpuppet, a pivot pin at the other end of said llllk to which one end ofsaid lever is pivoted, a segment with a series of holes fixed to thesliding puppet and a spring influenced catch fixed to the handle of saidlever and adapted to engage with one of said holes, substantially asdescribed and shown and for the purpose set forth.

In witnes'swhereof I have hereunto set my hand in the presence of twowitnesses. ROBERT LEONARD HORRELL. Witnmes:

Hanson C. (10x11,

Fnar.

